Table 2.

Results of Level I study quality analysis

Study	Level of evidence	Randomization	Allocation concealment	Blinding			Baseline comparability	Mean followup (months)
				Participants	Assessors	Analysts
Kim et al. [31]	I	Done	Done	Unclear	Not done	Unclear	Done	40
Kim et al. [32]	I	Done	Done	Unclear	Not done	Unclear	Done	25